Yes, if your 2017 tax file is on your computer you can transfer it into your 2018 return. You will want to start a new return and then transfer the 2017 file into it. See the steps below from a TurboTax FAQ on transferring your tax files:
- Open TurboTax 2018 and choose to Start a New Return from the TurboTax File
- Don't open an existing return by selecting Continue.
- When your 2017 tax file appears on the Good News screen, select it and click Transfer Return.
- If you don't see last year's tax file, select Browse and in the new window, select All Files (*.*) from the drop-down in the lower right corner. Then browse to wherever you stored your 2017 return and open it.
- If you still can't locate your return, it might be on another computer. We've got instructions on moving your return to a new computer.
- After the transfer is complete, check the screen for any special instructions. If none, select Continue.
- Now save your new tax file to ensure you don't lose any info and continue to follow the on-screen instructions,
- You'll also have a chance to review, edit, or delete transferred information later on.
Note that once you've gone past the Transfer screens, you can't revisit them. If you need to re-transfer, start fresh with a new return by following the steps above.
See more information here: