IGST applies only when the "Place of Supply" is in a different state from the buyer's registered location.

To validly record this entry and claim ITC, you must possess a proper tax invoice from the supplier that includes their GSTIN, the HSN/SAC code of the items, and the specific IGST amount charged. Software Recording (e.g., TallyPrime / Tally.ERP 9) How to pass accounting entries under GST - ClearTax

The tax paid, which acts as an asset because it can be claimed as Input Tax Credit (ITC) to offset future tax liabilities on sales.

The "19 - Purchase IGST Entry.pdf" likely refers to a practice document or a standardized accounting instructional file used to demonstrate how to record under India's Goods and Services Tax (GST) . In accounting, an IGST (Integrated GST) entry is specifically used when goods or services are purchased from a supplier located in a different state or union territory. Standard Journal Entry for IGST Purchase

IGST is calculated by applying the relevant tax rate (e.g., 5%, 12%, 18%, or 28%) to the total taxable value of the goods. For imports, it is calculated on the value including Basic Customs Duty (BCD) .

The total liability owed to the vendor, including the tax. Key Features of IGST Purchase Entries