The best way to see what happened is to put the 21 and 22 tax return side by side and review them line by line. Did your withholding change? Did you fill in a new W-4 form last year? If you did that could be your issue since the new withholding tables on the new W-4 forms I meant to keep you as close to zero as possible on your return.
If you have a specific line question that you don't understand then you can post that in this forum and we'll try to explain it to you.