How can i save my quickbook files after i close my business for tax purposes

You can convert your data to QB Desktop file format and use the trial version to access your historical data.

Thanks for posting here, @aaspectrum.

Allow me to guide you in saving your QuickBooks files so you can still be on track with your taxes.

You can utilize the Export Data feature from the Gear icon to download the account's data. Here's how:

1. Go to the Settings tab.
2. Select Export Data from the Tools column.
3. Choose the data you want to save from the Reports and Lists sections. You can also select a date range in the Pre-selected date ranges field.
4. Click on Export to Excel.

You can read this article for more info: Export your reports to Excel from QuickBooks Online.

If you wish to include your inventory items, feel free to follow the steps below: 

1. Select Products and Services from the Gear icon.
2. Click the More icon and pick Run report.
3. Pick the Export icon on the report page. Then, Export to Excel.

You might want to customize the report before saving it. Check this article for more info: Customize reports in QuickBooks Online.

For additional questions about managing your data in QBO, click the Reply button below. We'll be willing to help. Keep safe, and have a good one.