Annualizing Income

Hi!!

While preparing my Trust return I was informed that there would be an underpayment of tax penalty which I expected.  I followed the directive to finish the return and return to the program to annualize the income which hopefully will lessen the penalty since much of the income is Q3 and Q4.  I put all income into a spreadsheet based on the directive but, I have no idea how to get back to the annualization worksheet in the TT program.  I called support and I got no where with the agent.  

Can someone give me some help getting back to the worksheet in the program to annualize?

Thanks 

Tp