500+
accounting firms served
7
Countries: US · UK · AU · NZ · CA · AE · BH
60%
Avg. cost reduction
4.9/5
Client satisfaction · 127 reviews
Illinois firms, especially in the Chicago area, manage flat-rate individual returns, replacement tax on business entities and a busy March 15 partnership deadline.
Our preparers work IL-1040, IL-1065 and IL-1120-ST returns alongside the federal filing, including replacement tax and apportionment.
What We Offer
Illinois tax work we handle
IL-1040 with Schedule M and credits
IL-1065 and IL-1120-ST with personal property replacement tax
Chicago-area local taxes and Cook County considerations
Services for US firms
One offshore team, every US workflow
US tax preparation
1040, 1120, 1120-S, 1065, 1041 and 990 returns in your software.
Learn moreBookkeeping & write-up
Monthly write-up, reconciliations and trial balances in QuickBooks and Xero.
Learn morePayroll (Gusto / ADP)
Payroll runs, 941/940 prep and state filings in Gusto, ADP and QuickBooks Payroll.
Learn moreAudit support
Lead schedules, PBC tracking and working papers built to your methodology.
Learn moreSales & use tax
Nexus reviews, registrations and multi-state filings after Wayfair.
Learn moreCase study · Austin, Texas
58% cost reduction and 3× throughput during tax season
A mid-sized Texas CPA firm eliminated seasonal burnout by moving 1040 and 1120S preparation to a dedicated offshore team — without hiring a single new local employee.
Read the full case study58%
cost reduction
3×
throughput
Get a tailored proposal
Step 1 / 2Mutual NDA before scoping · Reply within 1 business day · No obligation
Ready to Scale Your Firm Without Scaling Your Headcount?
Book a no-obligation 30-minute discovery call. No commitment, no pressure — just a conversation about how we can help.
Prefer email? Write to us at Info@accountingallygroup.com