Monthly Treasury Statement (MTS) — Table 4: receipts by source via US Treasury Fiscal Data. Returns monthly totals of federal government receipts grouped by classification (individual income tax, corporate income tax, social-insurance receipts, excise, customs, estate-and-gift, miscellaneous). Each row carries record_date, classification_id, classification_desc, current_month + current_fytd (fiscal year-to-date) gross_rcpt / refund / net_rcpt amounts, plus prior_fytd comparisons. Backbone of any "how much money is the federal government bringing in" question. Use Fiscal Data filter syntax.