Carry on. and later open T1 page one and click the modify data button just below the name and address. I tried it with last year's return.
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Thanks. Here is the real story and is a bit embarrassing. On a late, dark and stormy night after a couple of drinks in February, I completed page 1 (and no other pages) of the return and saved it. To-day I opened my return and noticed a typo in my year of birth and in my address. So, I clicked on the "modify data button", made the corrections on the pop-up but when I reopened the return, the same old typos were still there.
So, is the solution to complete all 4 pages of the return and then click on the "modify data button" to make the necessary corrections?
P.S. One more confession. I did not file my 2011 return electronically. I used StudioTax to do all the calculations for my 2011 return and transcribed all the data to a paper return and filed the paper return.