After you file

I haven't paid my 2021 taxes yet, but I don't know if I need to pay or not. I haven't completed the filing, so I don't know if I need to pay. 

 

I know that if I don't owe taxes, and I'm getting a refund, then I don't need to file an extension. But if I owe taxes, and I didn't file an extension, then will I get a penalty for that?

 


if not, then there will be penalties for late payment of estimated tax that stops on 4/18/2022

Are you saying that penalties for late payment of estimated taxes stop on 4/18/22, so I'm not penalized every month I don't file/pay after that?


late filing penalties of 4.5% for up to 5 months after the 4/18 deadline

So the late filing penalties end 9/18/22? But the extension ends in 6 months, in Oct '22. 

Can all these penalties be waived for any reasons? I had late estimated tax penalties waived before, a few years ago, and I don't know if they'll waive anything again.