Are there any Irish mail order companies filing tax returns with HMRC ? And can they do it through Quick Books ?

I can share some information about filing your tax returns, @IndigoEssencesB. 

After you set up your tax agency in QuickBooks Online (QBO), assign tax categories to your products and services, and add them to your invoices or receipts for your customers, you can easily check the amount of taxes you owe in QBO. Once you are ready to file your tax return, you can either e-file it on your tax agency's website or send it by mail. After you file, you can keep track of your new VAT payment in QuickBooks to ensure that your records are up to date. Check out these articles for more information about setting up and using the VAT feature in QBO:

• Set up and use VAT in QuickBooks Online
• File your VAT return and record tax payments in QuickBooks Online

If you want to mail your tax returns from QuickBooks Online (QBO), you can use a third-party app that integrates with QBO. 

Here's how to find one:  

1. Log in to your QuickBooks Online account and click on the Apps tab on the left navigation bar.
2. Look for the app you want to connect with in the search bar or Browse by category. 
3. Once you find the app, follow the instructions to connect it to your account and authorise it. 

For more information on how to manage the app and authorise it to connect to your account, you can refer to this article: Integrate apps in QuickBooks Online. 

Here's a guide on running a Return of Trading Details (RTD) report in QuickBooks Online. It'll guide you with running the report and it tells you more about the information included in the report. 

If you require more information on filing taxes, please let me know by replying below. Have a great day!