Provide end-to-end administrative and accounting support for Polish JDG contractors Prepare, issue, and send invoices Manage calculation and documentation of foreign-exchange differences Track and process business expenses Assist with preparing and submitting VAT UE, VAT-7, ZUS reports, monthly tax advances, and annual tax declarations (PIT-28, PIT-36) Inform team members about relevant legislative changes Guide contractors on CEIDG update procedures and deadlines Communicate rules and deadlines for new ZUS relief programs Act as a trusted advisor on tax-related matters