Self employed

TurboTax does not support Form OW-8-P-SUP-C. 

To use the annualized income installment method to figure out the underpayment penalty, in Forms Mode, check the box on Form OW-8-P and manually enter the required annual payment on line 9 for each quarter. You will also need to attach manually filled out Form OW-8-P-SUP-C to your return and then file.