A method for signing an additional deduction electronic contract of an individual tax special item online

The invention discloses a method for signing an additional deduction electronic contract of an individual tax special item online. The method comprises the steps of obtaining a signing request of an electronic contract which is deducted from an individual tax special item, then sending the electronic contract which is requested to be signed to a signer, carrying out identity verification on the signer through one or more verification modes, and finally displaying the electronic contract for the signer to sign when the identity verification is successful. Visibly, the method comprises the following steps: when a taxpayer requests to sign an electronic contract for declaring additional deduction of a tax special item, one or more kinds of identity verification is carried out on the signer before the signer signs the electronic contract, and the signer is allowed to sign the electronic contract only under the condition that all kinds of identity verification are passed, so that the problem that illegal personnel