If you read through that other thread then you must already be aware that it is very hard for most people to use itemized deductions since the tax laws and the standard deductions changed after 2017. You can try using the taxcaster tool to see how your tax returns may look for 2020:
https://turbotax.intuit.com/tax-tools/calculators/taxcaster/
Or--if you are tying to base the VERY important decision as to when to get married on income taxes for 2020, buy the desktop software for 2020 and use it to prepare some "dummy" returns as Single or Married Filing Jointly to compare, and see how it turns out. If you use desktop, you can prepare an unlimited number of returns to try out various scenarios.
https://turbotax.intuit.com/personal-taxes/cd-download/
...."My employer did not compensate me.....
If you are a W-2 employee you cannot deduct a home office on your federal return. As of the tax laws that changed for 2018 and beyond, W-2 employees cannot deduct job-related expenses on a federal return.
https://ttlc.intuit.com/questions/4482873-which-federal-tax-deductions-have-been-suspended-by-tax-re...
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
