首先，我们需要审查我们的进项税额抵扣政策。
其次，进项税额抵扣的要件形式要求采购环节做好调整应对。[{'character': '其', 'pinyin': 'qi2', 'highest pitch': 8.17, 'lowest pitch': 7.93, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '次', 'pinyin': 'cii4', 'highest pitch': 12.3, 'lowest pitch': 8.04, 'duration': 0.26, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.28}, {'character': '进', 'pinyin': 'jin4', 'highest pitch': 11.21, 'lowest pitch': 10.0, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '项', 'pinyin': 'xiang4', 'highest pitch': 10.49, 'lowest pitch': 8.75, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '税', 'pinyin': 'shuei4', 'highest pitch': 9.6, 'lowest pitch': 6.46, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '额', 'pinyin': 'e2', 'highest pitch': 7.54, 'lowest pitch': 6.37, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '抵', 'pinyin': 'di3', 'highest pitch': 7.86, 'lowest pitch': 4.73, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '扣', 'pinyin': 'kou4', 'highest pitch': 7.77, 'lowest pitch': 6.59, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 7.21, 'lowest pitch': 6.15, 'duration': 0.1, 'prosody hierarchy': '#1'}, {'character': '要', 'pinyin': 'iao4', 'highest pitch': 9.45, 'lowest pitch': 7.04, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '件', 'pinyin': 'jian4', 'highest pitch': 8.17, 'lowest pitch': 6.79, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '形', 'pinyin': 'xing2', 'highest pitch': 6.79, 'lowest pitch': 4.66, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '式', 'pinyin': 'shiii4', 'highest pitch': 9.38, 'lowest pitch': 6.36, 'duration': 0.25, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.33}, {'character': '要', 'pinyin': 'iao1', 'highest pitch': 9.07, 'lowest pitch': 8.1, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '求', 'pinyin': 'qiou2', 'highest pitch': 8.22, 'lowest pitch': 6.43, 'duration': 0.27, 'prosody hierarchy': '#2'}, {'character': '采', 'pinyin': 'cai3', 'highest pitch': 8.22, 'lowest pitch': 5.17, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '购', 'pinyin': 'gou4', 'highest pitch': 10.13, 'lowest pitch': 5.17, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '环', 'pinyin': 'huan2', 'highest pitch': 8.21, 'lowest pitch': 5.89, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '节', 'pinyin': 'jie2', 'highest pitch': 6.88, 'lowest pitch': 5.83, 'duration': 0.22, 'prosody hierarchy': '#1'}, {'character': '做', 'pinyin': 'zuo4', 'highest pitch': 8.5, 'lowest pitch': 6.69, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '好', 'pinyin': 'hao3', 'highest pitch': 6.81, 'lowest pitch': 4.67, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '调', 'pinyin': 'tiao2', 'highest pitch': 8.46, 'lowest pitch': 5.51, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '整', 'pinyin': 'zheng3', 'highest pitch': 8.82, 'lowest pitch': 5.45, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '应', 'pinyin': 'ing4', 'highest pitch': 9.27, 'lowest pitch': 6.29, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '对', 'pinyin': 'duei4', 'highest pitch': 13.44, 'lowest pitch': 7.0, 'duration': 0.24, 'prosody hierarchy': '#4'}]