I use minimum raises in my game. Recently I've been thinking if it's actually a flaw in my game. I use it because I feel that if I fold after the flop it saves money. Sometimes I'll raise more. Im grinding 6nl on 888poker atm and instead of raising 12 cents ill raise 14, or 16. Is raising minimum a flaw that I shouldn't do?

I'm doing pretty okay atm trying to grind a bankroll out of nothing . Following bankroll management. Got 8 bucks free from the site and now im at 120 bucks. Recently got 3rd in a tournament for 78 bucks, entrance was only 1.50 . I feel I have potential and that I could make money from poker with discipline and strategy.

Another question is that I was wondering if poker players have to pay any tax at all? I'm from canada. Say a player withdrawals 20g's to there bank do they have to pay any additional tax?

IMO riase more when you would prefer everyone fold, but never base it off hand strength.

E.g. i raise 3x everywhere except button where i raise 2x (position, come at me bro) and sb i raise 4x (this is for 6max ring game when you are opening the pot)

I've no idea what minraising every position would do. I imagine it can work fine... you'll just end up taking down fewer pots preflop

I tend not to min raise.
At the slow stakes your just inviting everyone in to the pot.
For example at a NL2 9 max table;
Im under the gun +1 with say AA KK QQ.
I raise 4x to charge people a bit extra to play in position vs me.
This raise stops me playing a pot v 3 or 4 people.
Lets say I only min raise though. I make it 0.04.
A player or two in middle position call. Suddenly the CO and the button decide they have value to play and call. Im now hoping some one tries to steal the dead money. They dont. Horrible situation for my big hand when I go to the flop.

The other reason I dont min raise from early position is due to the fact even at 2NL I like to mix my game up. Some people do pay attention to position but dont realise that I am balancing my range so I can raise with something like 67 suited from UTG+1

If I get a caller and the flop comes 458. Nice flop for me when Im supposed to be holding TT+ or AQ+

If I min raise then that flop is not so good for me. To many people could easily have a piece or a better draw.

The problem with your thinking is that as the PFR, you are much more likely to win the pot postflop than villain (unless there is a giant skill gap in favour of villain or villain is a sticky nit). Therefore, by making villain put more money in the pot you make a profit the times that you do win, which will be more than the amount of times that you lose.

The exceptions to this are games which are mostly based on fold equity (20-40bb tournament play, for instance).

Cash games:

Min raising is not very profitable as you are only making the villain pay the minimum when he is actually capable of paying much more when he is behind. That is, when you have a strong hand. Open raising the minimum from BTN is good as you induce the blinds to play a hand out of position which is bad for them.
Howver, at this limit (NL6), most or all players are very bad and not aware of raise sizing and position. Play a few hands and try to see on what level your opponents are. If they are weak and loose, adjust your raise sizing on your hand strenght and you will make MUCH more money with premium hands and loose MUCH less with marginal hands. But you must be aware of good players that will see this in your game and you will have to adjust yourself when playing against them by adjusting raise size with position.
To conclude, dont be shy to bet big with good hand. They WILL call you.

MTTs:

Min raise is very efficient when everyone is short stacked as it will do the same effect as a 3x raise.

I totally agree. I play on 888 poker too and most of the times your opponent will call you if you raise. It could be 2x, 3x or even 4x, if they planned to call they will do so even if their hand is too bad to call such a big raise.

After playing several hours at microstakes on 888 poker I realized that a majority of your opponent will play their cards and not paying attention to your playstyle, the amount that bet/raise etc. So imo betting big if your hand is good enough will be very beneficial.

For the MTT's, your reasoning is correct. Raising small will limit the amount of chips that you'll loose if the flop is bad for you but it will still put a lot of pression on the other players. Nanonoko (Pokerstars online pro) recently said that min raise is becoming the standards in MTT's nowadays.

I play 4NL, I could be way off but I play the opposite to what you guys are saying; I raise to .08 in EP, .10-.12 in MP, and .12, .14, and .16 in CO and BTN depending on what the blinds are like. I play TAG. The thinking behind this is that when you raise from early position you have a stronger hand on average than you do when you raise on the BTN. If players pick up on this it can be very beneficial if you can stick to your TAG playstyle and are playing against regs. Also your actually giving them worse odds to call when you are on the BTN and raise to .16 so theoretically they have to have a better hand to play because they are OOP and dont have the odds to play a cheap flop.

All of the above is good.
In short, in nanostakes cash games, open slightly larger with monsters, slightly smaller when stealing, but try and avoid minraises where possible, as it gives great pot odds to speculative hands.
In tourneys, the "minraise plus" bet size is a winning smallball strategy after the first couple of levels, as your fold equity is increased when stacks are relatively short.
This is a bad strategy for cash games. In early position, your range is strong, consisting mainly of big pairs and big aces. Ideally you want to be heads up against one opponent, so you should set a price that dissuades multiple callers. If you have aces, you don't want two or three players getting into the pot cheaply with small pairs and suited connectors, as they will stack you when they flop a monster.
In late position, you're playing more speculative hands (or total junk), so you don't want to build a big pot. In addition, the blinds typically have stronger ranges when they call (or 3-bet) your steal. If you open to 5bb with 76s, you're in bad shape when the 12/7 nit in the blinds calls. He always has a pair or a big ace.

The principle is quite simple. When we have a hand, we want to bet the most that will get called. When we're bluffing, we want to bet the smallest that will likely result in villain folding. Build a big pot when you have top pair/overpair hand. Keep it small when you don't. "Big hand, big pot, small hand, small pot".