Guanajuato → Michoacán · Autopista 45D Salamanca-Querétaro
Returning from Salamanca, Guanajuato, back to Morelia, Michoacán, the itinerary retraces the same 121 km (75 miles) of the outbound segment, predominantly via Autopista 45D Salamanca-Querétaro, adding another 1h 21m to the corporate odometer. Unlike the outbound leg, the homeward journey is usually executed at the close of the business day, when heavy truck traffic, accumulated fatigue, and dropping daylight all demand sharper focus. Anyone hoping to ease the arrival back into Morelia, the capital michoacana y patrimonio histórico colonial, may consider an overnight stop in a midpoint town and splitting the haul into two shorter stints. Fuel expense holds steady near MXN 244.42, totalling roughly 20.2 liters for the entire trip when added to the outbound segment. The return reimbursement reaches MXN 786.50, doubling the aggregate payout for the full journey. Log each leg separately in the Clara receipt, with distinct timestamps, so the paperwork accurately mirrors the vehicle's actual movement. For the US professional driving the 121 km (75 mi) between Salamanca and Morelia, reimbursement of MXN 786.50 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→Morelia corridor must show date, business purpose, and odometer readings.