easy free spreadsheet tracking equity basis for an S corp member owner - starting late

[CHARU2017TAX]

I only recently learnt about 'basis' and the need to track it.   because   IRS is asking for since 2021 when I  want to use the biz loss flow through via the K-1 on my personal 1040. 

How to track it now? Any simple spreadsheet?

I started a consulting business as a single member LLC-taxed as an S- Corp in  2015.  

[Mike9241]

simple depends on what has transpired in the corp since it was formed in 2015. loans and losses can make it complicated 

here's a general link.

https://www.bing.com/images/search?q=s-corp+basis+worksheet&qpvt=s-corp+basis+worksheet&form=IGRE&fi... 

note that the IRS, in some cases, requires that form 7203 which tracks basis be included with your 1040

https://www.irs.gov/site-index-search?search=7203&field_pup_historical_1=1&field_pup_historical=1