I receive multiple small pension checks from different sources. The total amount deducted for income taxes is not enough to pay my tax bill at the end of the year. Can I self pay the difference quarte

[Critter]

You can either increase the withholding  OR  pay with the return  OR  pay in quarterly estimated payments.  

[Hal_Al · Accepted solution]

If the amount you owe, at the end of the year, is less than $1000, you can just wait to pay at tax filing time. There is no "underpayment" penalty when you owe less than $1000.