How can I download turbotax 2018 to file my 2018 taxes? I only see options for 2019 - 2022 on the website.

[xmasbaby0]

Sorry--it is too late to download 2018.  The software is not available, nor would it be supported or updated even if you could find it on eBay, etc.  Any 2018 refund has now been forfeited; if you owe tax due the IRS still wants to be paid with interest and penalties.

You could seek local paid tax help or you can use the paper forms to prepare by hand to mail in.

IRS 2018 Schedules 1 thru 6 (only if needed)
Sch 1 : https://www.irs.gov/pub/irs-prior/f1040s1--2018.pdf
Sch 2 : https://www.irs.gov/pub/irs-prior/f1040s2--2018.pdf
Sch 3 : https://www.irs.gov/pub/irs-prior/f1040s3--2018.pdf
Sch 4 : https://www.irs.gov/pub/irs-prior/f1040s4--2018.pdf
Sch 5 : https://www.irs.gov/pub/irs-prior/f1040s5--2018.pdf
Sch 6 : https://www.irs.gov/pub/irs-prior/f1040s6--2018.pdf

If you owe tax due, you will still have to pay, and you will be billed later for the interest and penalties owed.

[DoninGA]

TurboTax does not support tax year 2018.  If you are filing the 2018 return for a tax refund it will not be paid as it is beyond the 3 year limit for filing from the due date of the tax return.

If you have taxes owed on the 2018 return it needs to be paid as soon as possible since penalties and interest will continue to accrue until the tax return is filed and the taxes are paid.  The IRS will mail you a bill for the penalties and interest.

You should seek out a local tax professional to assist you in the completing the 2018 tax return if taxes are owed.