Guanajuato → Guanajuato · Autopista 45D Salamanca-Querétaro
Wrapping up the trip, the homebound leg from Salamanca, Guanajuato, back to León, Guanajuato, layers another 99 km (62 miles) onto the odometer along Autopista 45D Salamanca-Querétaro and tacks on roughly 1h 6m to the cumulative day. Drivers leaving Salamanca, the sede de la refinería Ing. Antonio M. Amor de Pemex, usually pull into León, the capital del calzado y mayor ciudad de Guanajuato, with an empty calendar but an inbox of paperwork — toll receipts, fuel invoices, visit reports, and meeting minutes all need to be tagged inside the cab before they get tangled with other paper stacks at the office. Average fuel spend on the return holds near MXN 200.86 for the 8.3 liters (2.2 gallons) burned. Mileage reimbursement for the homeward stretch totals MXN 643.50 at the MXN 6.50/km benchmark. Use the Clara generator to emit a single PDF combining the outbound and return legs with a QR validation code: corporate finance processes the batch within two business days. For the US professional driving the 99 km (62 mi) between Salamanca and León, reimbursement of MXN 643.50 stays non-taxable to the employee when the employer follows an accountable plan under Treas. Reg. §1.62-2 and reimburses at or below the IRS standard mileage rate. US employers generally reimburse at the IRS standard mileage rate so the payment stays non-taxable to the employee under Pub. 463. Keep the IRS-compliant expense report (Form 1040 Schedule C, line 9) alongside the fuel receipt from any EIA-tracked retail station network pump used along the leg; Internal Revenue Service (IRS) examiners pull contemporaneous mileage logs first when auditing Schedule C unreimbursed business expenses, and the Salamanca→León corridor must show date, business purpose, and odometer readings.