List Computer in 2017 or 2018?

[ATSMAN]

I ordered a new computer in Nov. 2017. I paid a deposit in November. The computer was installed and used in late Dec. The final invoice came in 2018 and was paid for in January 2018. I am on a cash basis for taxes.
Would I post the sale in 2017 or 2018 seeing I paid for in 2018?

You partially paid for it in 2017 and put it to service in 2017, so if it helps take the deduction for 2017.

[ruthc]

I ordered a new computer in Nov. 2017. I paid a deposit in November. The computer was installed and used in late Dec. The final invoice came in 2018 and was paid for in January 2018. I am on a cash basis for taxes.
Would I post the sale in 2017 or 2018 seeing I paid for in 2018?