POST https://rest.tsheets.com/api/v1/customfielditemfiltersit show 404 not found but it works for get method

I'm here to help you obtain the necessary permissions, Developer. However, I need more details so we can get on the same page.

Would you mind sharing whether you'd like to develop an application and integrate it with QuickBooks Online (QBO)? If so, I'll route you to the best support available. We have an Intuit Developer forum where experts handle integrations such as APIs, development, and other related concerns. I suggest posting your situation on their platform, as they are the best suited to assist you.

I'd be glad to guide you on how to do this:

1. Proceed to this link: https://help.developer.intuit.com/s/
2. Choose QuickBooks Online.
3. Select Ask a Question.
4. Log into your existing Intuit Developer Account or create a new one.
5. Clearly explain your concerns and provide specific details and examples to help them better understand your requirements.
6. Click Ask.

If this isn't the case, could you share more details about your issue? This way, I can provide you with an accurate resolution.

Please know you can post anytime if you have questions or want to share your best practices using the product. The Community is always here to assist you, Developer.