Can short term disability be a reason for distribution on form 1099-R? Should I pay more than what the federal income tax already has taken?

 

Retirement tax questions

That is possible. What is the distribution code in Box 7?  TT gives you credit for the amount withheld, but you may owe more if it's not enough to cover the actual taxes due (based on your overall income).

Retirement tax questions

The distribution code is 1.