How to convert Inventory to COGS without having QuickBooks inventory tracker?

Glad to have you here on the Community page, @HitchCovers76.

I discovered a post with a similar problem that I already answered. You can open this link for the answer: https://quickbooks.intuit.com/learn-support/en-us/reports-and-accounting/re-cogs-split-for-inventory....

I also encourage checking with a professional accountant to help review and account your transactions accordingly to meet the amounts needed per account.

As always, read our QBO help articles in case you need tips and related links in the future.

Post again if there's anything you need assistance with. I'm a few clicks away to help. Wishing you a good one!

@HitchCovers76 

Yes, you are asking about periodic inventory.

There are two ways to do periodic inventory, choose one and stick with it, you can not mix and match

1. (my preference) Create an asset account called purchases and post all purchases of item for resale to that account. Periodically, weekly, monthly, etc value the inventory on hand, subtract that value from the amount shown in the purchases account and do a journal entry for the answer to the subtraction
debit COGS for that value
credit purchases for that value

OR

2. Post all purchases to COGS. Periodically, but at least at the end of the year, you value the inventory on hand and do a journal entry.
debit the asset purchases account for that value
credit COGS for that value

Print the P&L
then reverse the journal entry
debit COGS for that same value
credit the asset purchases account for that value

This last journal entry, moves the value of what was on hand at the end of year back to COGS so the cost will be counted against the new year sales.