Indian businessman are required to fill-in and submit their Value Added Tax (VAT) returns in a timely manner and state governments provide Microsoft Excel template to make the computation easier and automated. However, the excel form-template provided by Rajasthan state government for "VAT Form 7A" always resulted in a read-only error for "PERIOD TO" field when a user completes the "PERIOD FROM" field with correct date as shown below. This error prevents further data input impossible, the concerned authorities and helpline have no idea/solution about this. Thankfully, when my friend approached me with the issue I was able to fix this as shared ahead.