What you chose to do as far as I would guess is only be taxed as if you are a S corp. It has nothing else to do with making you an S corp, which requires establishment first as a C corp with an election for subchapter S. Your member equity contributions, which reflect your personal funds input, remains the same.
If you have a brand new FEaiN different than the one established with your LLC and have actual corporate documentation then it is different. You have two tax returns for this year. One as an LLC which does not have to be final as you can continue to operate your LLC, and one for the S corp for only the time from approval forward unless you acted as an s corp from day one which eould require you having already been receiving a reasonable W2 wage all along, for which you would have needed a FEIN anyway.
Money that a single member puts in or out of a LLC is plain equity. In multi member situations members can receive business deducted payments for work but not a single member.
In a S corp your money in is in the form of shares purchased and shareholders can loan money to their S corp but i would caution to avoid it as a single shareholder and determine also if you are as i posited possibly still an LLC but with requirements of you being an employee
