Increase Reliable Services Now Act This bill imposes limits on Internal Revenue Service (IRS) enforcement activities and hiring. The bill prohibits the IRS from hiring any person for enforcement activities until the end of a period in which the IRS has maintained for 6 consecutive months a level of access for phone lines of not less than 90%, and an average speed of answering calls in 4 minutes or less. The bill also requires that not less than 90% of regular IRS employees perform work in person at their job sites. The bill prohibits the IRS from auditing taxpayers with taxable incomes below $400,000 at a greater rate than before the enactment of this bill. Further, the IRS may not hire additional personnel (other than for return processing activities and call center operations) until its tax return processing backlog is not in excess of 5 million cases and it issues tax refunds within 6 weeks or less after receipt of a tax return.