GST return is a periodic document filed by businesses to report sales, purchases, and tax liabilities to tax authorities. It includes details of outward and inward supplies, taxes collected and paid. Accurate and timely return filing is vital for claiming input tax credits, ensuring compliance, and monitoring tax revenues. It aids in maintaining a transparent and efficient taxation system. 

Income tax return is a document filed by taxpayers to report their annual income, deductions, and tax liability to tax authorities. It provides a comprehensive overview of an individual's or entity's financial affairs. Timely and accurate return filing is essential to comply with tax laws, claim eligible refunds, and avoid penalties. It helps governments assess tax revenues and enforce tax regulations. 

Deed and documentation refer to legal agreements and records used to formalize various transactions and contracts. Deeds are written instruments that transfer property rights, while documentation encompasses contracts, agreements, and supporting papers. These documents outline terms, obligations, and rights of involved parties and serve as crucial evidence in legal matters, ensuring transparency and clarity in business and personal dealings.