How to add HSN code in Inward supplies of service. How to add HSN code while entering purchase invoice in QBO when it is completely service

You have me to help you add an HSN Code on your items, sushma1.

If you have lots of codes to enter, you can now record them in bulk. Here's how:

1. Choose Gear Icon > Import Data.
2. Click Products and Services List.
3. Click Download a sample file to get the import template. 
4. Choose Gear Icon > Import Data.
5. Click Products and Services List.
6. Click Choose File to find your file (from Step 3), then click Open.
7. Click Continue.
8. The QuickBooks Online fields and your fields will be shown.
9. Click Continue.
10. Adjust your data if necessary.
11. When you're ready, click Import [number] Records.

I've also added these references for more information:

• Importing products and services
• Common questions about importing data

I'm just a post-away if there's anything that I can help. Keep safe!