Can I download Turbotax2018 software? I don't want to do my taxes online.

Go online to Intuit.com. Choose their product TurboTax. You can download from there after you pay a fee. Or you can buy in any store that sells this--Costco or Best Buy. Or you can use Amazon.com to buy it.

You can purchase TurboTax for Windows on CD/DVD - I bought mine at costco.com for $40 but you can buy a downloadable version e.g. at amazon for $50 today.  I found this one (sold by Intuit) on amazon:    https://smile.amazon.com/TurboTax-Deluxe-Software-Download-Exclusive/dp/B07KR17TFD