Hi Tamil,
Thanks for contacting Syncfusion support.
We have unclear about your requirement and we have created a sample using inline form template editing which can be download from following link,
Please refer to the sample and could you please provide following details for your requirement?
1) Share the Grid code example.
2) As you have mentioned about custom tag helper, so please provide details and code example.
Regards,
Venkatesh Ayothiraman.