Yes you can but it is not quick, easy
or cheap. It would be better
if you can take it back to the accountant.
But if you want to ....
You would first have to fill out a new
return in Turbo Tax (and pay for it) like you were doing it for the first
time and hopefully come out with the same results as your original filed
return. Then when it exactly matches what you filed and amounts are the same
for every line on the 1040 tell Turbo Tax you want to file by mail and print
out the original return so TT thinks it was filed, then you can do the amended
return.