The only way to bypass the huge Turbotax updates is to turn off your internet before you start the program. However, I don't know if the program will then be able to recognize the internet to be able to transmit a return. You can try it.
You really should update the program right before you e-file, just in case something affects your return, and depending on what version you currently have, you might not be able to e-file without updating.
However, after you e-file, just stop using the program. Use the IRS website and your state website to track your refunds instead of launching the program. Turbotax updates about once a week in peak season. In May or June, run the program one more time so you get all the updates rolled into one so you have a fully updated program in case you need to amend later.
Also, if you bought the download instead of the CD, the download file on the server is always kept up to date. You may be able to download the current installer to a flash drive at a library or other internet location, then use the flash drive to install it on your computer at home.
