A number of tax-related limits that affect businesses are annually indexed for inflation, and many have increased for 2021. Some stayed the same due to low inflation. And the deduction for business meals has doubled for this year after a new law was enacted at the end of 2020. Here’s a rundown of those that may be important to you and your business. Social Security tax The amount of employees’ earnings that are subject to Social Security tax is capped for 2021 at $142,800 (up from $137,700 for 2020). Deductions Section 179 expensing: Limit: $1.05 million (up from $1.04 million for 2020) Phaseout: $2.62 million (up from $2.59 million) Income-based phase-out for certain limits on the Sec. 199A qualified business income deduction begins at: Married filing jointly: $329,800...