If I want to get and idea for next year can i just change numbers for this year and not save

[VolvoGirl · Accepted solution]

No.  The Online version automatically saves each entry you make.  So do not touch your real return.  You would have to set up a new account to test in.  You don't have to  You have to actually pay after you upgrade.  Go up to My Account and click on Print Center and try to print your 2016 return and it should make you pay unless you want to print it out.

Online is only good for 1 return.  But you can use the same email address for 5 accounts.   How to start another return in the Online version      https://ttlc.intuit.com/replies/3288574

[Texas Roger]

Don't do that on your current account. Start another account to do that on. Congress is likely to pass sweeping tax law changes that could be retroactive to 2017 so it's anybodies guess what will happen.